Quote Originally Posted by jgruberman View Post
All issues have been resolved, here are the steps I performed this morning:
  • Went to Interstate and replaced the second battery. He acknowledged that it's "better" to replace both at the same time but because the second one was testing "Not Bad", he wasn't able to Warranty replace it but he did offer me 45% off as a prorated replacement cost.
  • Drove the truck home, approx 15 miles. At this time, there was no change in error lights or speedometer.
  • Went to reflash the truck with the DRD program but for some reason, the MM3 tuner said there was an SD card error and recommended I reformat it
  • Copied all files off the SD, formatted it FAT32 and copied all files back on
  • Programmed the DRD tune to the truck successfully this time, currently no error light change
  • Went into the MM3 tuner and programmed the tire size from the current setting of 35 to "35" again. As soon as this program completed, the ABS light went away.
  • Checked for DTCs with the MM3 tuner, none present - drove the truck around the block and the speedometer also worked.


I'm guessing the ECM somehow lost the program and the SD card maybe was corrupt and needed to be reformatted?

Also a side note, when I went back this morning the Interstate guy said that even though the first battery tested "OK", it definitely had an internal short because it was scalding hot for several hours after it got removed from the truck he said.
Awesome!

Glad you got it all resolved.

New batteries do wonders for our trucks. LOL


2016 Ram Laramie 3500, G56, 6.7, CC, 4x4